EP1909409A1 - Méthode pour contrôler les instants de transmission sur la liaison montante dans un système de communications radio - Google Patents

Méthode pour contrôler les instants de transmission sur la liaison montante dans un système de communications radio Download PDF

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Publication number
EP1909409A1
EP1909409A1 EP06022237A EP06022237A EP1909409A1 EP 1909409 A1 EP1909409 A1 EP 1909409A1 EP 06022237 A EP06022237 A EP 06022237A EP 06022237 A EP06022237 A EP 06022237A EP 1909409 A1 EP1909409 A1 EP 1909409A1
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EP
European Patent Office
Prior art keywords
base station
signals
node
time offset
subscriber terminal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06022237A
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German (de)
English (en)
Inventor
Iwajlo Angelow
Mieszko Chmiel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Solutions and Networks GmbH and Co KG
Original Assignee
Nokia Siemens Networks GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nokia Siemens Networks GmbH and Co KG filed Critical Nokia Siemens Networks GmbH and Co KG
Priority to EP06022237A priority Critical patent/EP1909409A1/fr
Priority to PCT/EP2007/060410 priority patent/WO2008040711A1/fr
Priority to US12/311,603 priority patent/US20100029291A1/en
Priority to EP07820792A priority patent/EP2076978A1/fr
Publication of EP1909409A1 publication Critical patent/EP1909409A1/fr
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2662—Arrangements for Wireless System Synchronisation
    • H04B7/2671—Arrangements for Wireless Time-Division Multiple Access [TDMA] System Synchronisation
    • H04B7/2678—Time synchronisation
    • H04B7/2681—Synchronisation of a mobile station with one base station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W56/00—Synchronisation arrangements
    • H04W56/0005—Synchronisation arrangements synchronizing of arrival of multiple uplinks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/04—Interfaces between hierarchically different network devices
    • H04W92/10—Interfaces between hierarchically different network devices between terminal device and access point, i.e. wireless air interface

Definitions

  • the invention relates to a method for the timing of transmission of signals in the upward direction by subscriber terminals such that they can be received synchronously at the location of a base station of a radio communication system. Furthermore, the invention relates to components of a radio communication system for carrying out the method according to the invention.
  • a so-called multi-step timing alignment control is used both for a first access of a subscriber terminal and for existing connections.
  • the subscriber terminal is initially oriented to control the time transmission of an access radio block in accordance with the principle of an open loop on signals of the base station transmitted in the downlink direction.
  • the access radio block has a comparatively large guard period in order to increase the likelihood of receipt of the access radio block within a time slot by the base station.
  • this signal Upon receipt of the access radio block by the base station, this signal, depending on the time of receipt of the access radio block, the subscriber terminal, whether a retract or advance, ie an adjustment of the so-called timing advance, the transmission by the subscriber terminal is required.
  • the base station informs the subscriber terminal of the number of time units that should be delayed or preferred.
  • the base station is oriented according to the principle of a closed loop to speech data packets transmitted by the subscriber terminal in the connection or to signals of the so-called SACCH (Slow Associated Control Channel).
  • DTX DTX - Discontinuous Transmission
  • the control of the timing advance oriented to periodically transmitted by the subscriber terminal so-called SID (Silence Description) frame or to signals of the SACCH , so that in each case, all four multi-frame or 480 ms, a temporal adjustment of the transmission takes place.
  • the transmission is also timed every 480 ms, with the base station being based on received data packets.
  • the control is based on all eight multiframes or 960 ms of access radio blocks transmitted by the subscriber terminal.
  • Uplink transmissions are based solely on the time of reception of signals in the downlink direction so that signals from subscriber terminals located at different distances from a base station are not received in time from the base station.
  • E-UTRA Evolved Universal Terrestrial Radio Access
  • LTE Long Term Evolution
  • a so-called binary timingcontrol command which uses two binary states of a signaling bit to control a delay in or advance of the transmission by a certain increment still to be defined in microseconds (us) and with a periodicity also still to be defined is signaled.
  • a more or less the multi-step time equalization control command of the GSM standard corresponding command which is signaled only on demand.
  • the object of the invention is therefore to provide a method and components of a radio communication system, which allow a flexible and at the same time efficient timing of signal transmission in the upward direction. This object is solved by the features of the independent claims. Advantageous developments of the invention are dependent claims removed.
  • the base station for controlling a time transmission of signals of a subscriber terminal for a time-synchronous reception at a base station of a radio communication system upon determination that a determined time offset of received signals is equal to or greater than a predetermined threshold value, the base station is allowed to change one-shot control commands Multi-step control commands for controlling the timing of the subscriber terminal performs, or from the subscriber terminal initiated a synchronization procedure using a random access channel.
  • a binary or ternary signaling bit is used as the one-step control command.
  • the use of a ternary signaling bit instead of a known binary signaling bit is also claimed as an independent invention in an independent claim. It advantageously makes it possible to signal a third state or command, for example, that no time changes of transmissions are to be made by the subscriber terminal, and thus to prevent actually unnecessary time adjustments, which lead to an increased energy consumption of the subscriber terminal.
  • the time offset underlying the comparison with a threshold value is determined by the base station and / or the subscriber terminal, wherein the time offset is determined according to a further embodiment by means of a comparison of a received time of received signals with a time reference. This can be controlled on the basis of investigations and decisions of the base station or the subscriber terminal, whether a change of the format of the timing commands or a synchronization procedure should take place.
  • a current status of the subscriber terminal and / or a service type of an existing connection to the subscriber terminal is considered in the decision as to whether a change of the control commands should be performed or a synchronization procedure to be initiated. For example, if it is a service with high Quality of Service (QoS) requirements, predetermined requirements could no longer be met when performing a synchronization procedure. In this case, a compensation of the determined time offset and thus compliance with the requirements is possible only by means of a change to multi-step time control commands. The situation is different for a service with only minor requirements regarding time delays. In this case, advantageously, a synchronization procedure can be run through without the given requirements being met. The same applies, for example, to the status of a subscriber terminal, i. whether it actively maintains a connection, for example, or is only passive or asleep.
  • QoS Quality of Service
  • An inventive radio communication system and components of the system in the form of a base station and a subscriber terminal each have means for performing the method according to the invention.
  • FIG. 1 the structure of a radio communication system, in particular according to the current state of E-UTRA or UMTS LTE standardization, is shown by way of example.
  • a so-called access network gateway aGW Access Gateway
  • IP-based IP - Internet Protocol
  • the access network gateway aGW exchanges data traffic in the form of data packets.
  • the access network gateway aGW is further connected to a plurality of base stations Node B, which each supply an exemplary radio cell ZA or ZB with radio resources.
  • the exemplified base stations Node B are in turn connected via a radio interface with a user equipment UE A, UE B.
  • Signals are transmitted in the uplink UL (uplink) and downlink DL (downlink) on the radio interface.
  • the components of the radio communication system involved in the method according to the invention each have at least one transmitting / receiving device SEE for transmitting and receiving signals and a control device ST for controlling the components and the behavior of the transmitting / receiving devices SEE.
  • FIG 2 shows time diagrams for the exemplary illustration of the temporal drift of signals transmitted in the uplink direction UL by the user terminal UE as a function of a change in transmission delays.
  • FIG 2 is the technical document Tdoc R1-062372 entitled "Considerations on E-UTRA Uplink Time Synchronization", which is part of the 3GPP TSG-RAN WG1 # 46 conference in Tallinn, Estonia, August 28 to September 1 2006, was borrowed, borrowed, which is referred to for further explanations.
  • a maximum time offset (Max Timing margin).
  • the two upper timing diagrams show in comparison to this ideal time prematurely received signals of a so-called CP field (CP - cyclic prefix) starting subframe due to a shorter transmission delay (shorter propagation delay) and a time delayed reception of a signal Subframe due to a longer transmission delay (longer propagation delay), which are each to be compensated by the timing invention.
  • CP field CP - cyclic prefix
  • FIG. 3 shows corresponding time diagrams for subscriber terminals UE A, UE B (UEs frequency multiplexed) each using a different frequency, as illustrated by way of example in FIG. Due to a different physical distance to the base station Node B, signals of a respective subframe arrive at different times at the location of the receiving base station Node B.
  • a maximum timing misalignment should not be exceeded.
  • the maximum time offset should, according to the current state of E-UTRA standardization, see Tdoc R1-062372, be smaller than the length, preferably smaller than half the length of a cyclic prefix, which is assumed to be -3.65 to 4.13 ⁇ s , Values in the range of 0.5 to 1 ⁇ s are conceivable, whereby, according to the example of FIG. 3, the maximum time offset is less than half the length of the cyclic one Prefixes, ie less -2 us, should be chosen. At an assumed maximum speed of a subscriber terminal of 500 km / h and a perpendicular direction of movement to the base station, however, this maximum value is already reached after 0.5 or 1 second.
  • Such a sized maximum time offset of about 0.5 to 2 ⁇ s is not suitable, rapid changes of the transmission paths of up to 9 ⁇ s within 191 ms after the aforementioned birth-dead example of the technical specification TS 25.104 by means of binary timing commands whose maximum Step size and periodicity of signaling based on the maximum time offset is compensated.
  • FIG 4 and FIG 5 a first and a second embodiment of the method according to the invention are shown, wherein in the flowcharts given individual actions in the exemplary base station Node B and the subscriber terminal UE A of FIG 1 and signal transmissions on the radio interface between them after the time t are indicated.
  • the actions shown it goes without saying that further actions and signaling transmissions are possible, but these are not significant for the description of the method according to the invention.
  • the user terminal UE A is in a so-called RRC Connected Mode, ie in a state of active signaling exchange with the base station Node B, inter alia for maintaining a time synchronization with the time reference of the base station Node B.
  • Dies means that during an active transmission of signals, for example data packets of a service in a traffic channel or of special messages or sequences in a control channel, in the upward direction UL to the base station Node B this determines a time offset of the received signals for own time reference.
  • the base station Node B orients itself to determine the time offset at the strongest path of the received signal.
  • the base station Node B in the downlink DL to the subscriber terminal UE A signals that a transmission of subsequent data or signals in the uplink UL by a specific time Measure should be brought forward or delayed. This may be done by the base station Node B optionally in several signaling steps, for example when the subscriber terminal UE A maintains a packet data service and only at longer intervals, for example all four multiframes, data and / or signaling to maintain the synchronism in the uplink UL to the base station Node B. sends, the base station Node B, however, signaled in each multiframe a respective adjustment of the timing of the user terminal UE A.
  • the signaling of the base station Node B for the timing of the broadcasts of the user terminal UE A on the basis of binary, as they are known from currently existing standards, or ternary timing deficiencies according to the invention takes place.
  • the subscriber terminal UE A is signaled, for example by means of a signaling bit with the value +1, to delay the transmission by 1 ⁇ s, during which a value -1 indicates that the transmission is to be preferred by 1 ⁇ s.
  • the value 0 would signal that the user terminal UE A should not change the transmission over time.
  • the step size and the periodicity of the transmission of timing commands can be dimensioned depending on the maximum time offset.
  • the subscriber terminal UE A it is necessary for the subscriber terminal UE A to be aware of the periodicity and increment in order to be able to receive the commands and to convert them as desired by the base station. For this purpose takes place For example, a signaling by the base station Node B according to known protocols on higher layers.
  • This signal transmission for example a data packet of a data service or a synchronization sequence, is received by the base station Node B, and compared to determine a time offset, for example, the detected strongest signal path with a base station internal time reference. Subsequently, the base station Node B performs a comparison of the determined time offset for the subscriber terminal UE A with a predetermined threshold.
  • the base station Node B continues to carry out a signaling of a binary or ternary timing command which is received by the user terminal UE A receiving this command for adapting the timing subsequent transmissions is taken into account. If, on the other hand, the comparison reveals that the determined time offset is equal to or greater than the predetermined threshold value - "yes" result - the base station Node B switches from signaling by means of binary or ternary timing commands to signaling of multi-step timing commands.
  • Multi-step timing commands have the advantages described above, that a larger step size allows faster adaptation to the current time offset, without having to adjust a step size over parent and thus slow protocols as would be required with binary or ternary commands.
  • resource-saving binary or ternary commands are used for the case of a time offset below the predetermined threshold, which occurs mainly in practice less frequently occurring case of a determined time offset equal to or greater than the predetermined threshold on faster and more flexible multi-step instructions is used.
  • the threshold is defined to be 3 ⁇ s
  • the time offset of UE UE A signals from base station Node B were found to be 5 ⁇ s, this would mean exceeding the threshold of 3 ⁇ s and the base station Node B would correspond to the current binary or ternary command signaling switch to a signaling of multi-step instructions to compensate for this skew.
  • the user equipment UE A must recognize such a change in the format of the command signaling in order to implement these commands accordingly.
  • This recognition can be done according to the invention in different ways.
  • the user terminal UE A, the change of the command format or the exceeding of the threshold value for example, be explicitly signaled, for example, by setting a status bit of a signaling message on the physical or a higher layer of the ISO OSI layer model.
  • the status bits can be transmitted, for example, in a shared channel (shared channel or common channel) for several subscriber terminals on the physical layer (layer 1) or link layer (layer 2).
  • the user terminal UE A also be constantly trying to receive multi-step commands or to detect, ie binary or ternary commands and multi-step commands can be distinguished by the subscriber terminal in terms of their content, so that in this case no explicit signaling of the change must be made by the base station Node B.
  • This may also be carried out by the user terminal UE A only at periodic intervals, ie the subscriber terminal attempts, for example, every two frames to detect a multi-step command and thus notices a change of the command format carried out by the base station. In the same way, the subscriber terminal notices a change back to the binary or ternary command signaling. This advantageously limits the energy-consuming processing in the subscriber terminal UE A.
  • the subscriber terminal UE A can autonomously determine a change of the command format and adapt the detection accordingly when it receives signals of the base station Node B with a large or above threshold time offset to previously received signals (comparable description of FIG 5) and a temporal reciprocity is assumed even when using different frequencies between transmissions in uplink UL and downlink DL.
  • the user terminal UE A can also be oriented, for example, to signals of a pilot channel, synchronization channel or broadcast channel.
  • the known signaling as used to define the step size and periodicity of binary commands, can be changed or supplemented in such a way that the subscriber terminal is implicitly signaled at a specific step size value and / or periodicity, that subsequently multi-step instructions are used by the base station.
  • the steps according to the invention described above with respect to FIG. 4 are advantageous, in particular, for subscriber terminals or connections for which a rapid response to greatly varying time drifts is required.
  • subscriber terminals in, for example, a so-called active RRC connection mode (RRC connection mode) or in an RRC connection mode with a transmission delay sensitive service, such as video data transmission.
  • RRC connection mode active RRC connection mode
  • RRC connection mode transmission delay sensitive service
  • FIG. 5 shows a second exemplary embodiment of the method according to the invention in the form of a flowchart, which in turn is based on the starting situation described above.
  • the user equipment UE A receives signals of the base station Node B, in the radio cell ZA it is currently located, and controls an upward timing transmission to the base station Node B on the principle of an open loop control.
  • This can be, for example, signals of a pilot channel, synchronization channel or broadcast channel, which is transmitted by the base station Node B with a comparatively high transmission power and enables the subscriber terminal UE A to achieve reliable detection.
  • the received signals or the strongest signal path are compared in the user terminal UE A with previously received signals or its determined time reference, and a relative time offset between previous and currently received signals is determined. Subsequently, the subscriber terminal UE A compares the determined time offset with a predetermined threshold value.
  • This threshold value is defined, for example, by a standard specification or is signaled to the user terminal UE A as an individually adaptable value by the base station Node B or a higher-level component of the system.
  • the subscriber terminal performs UE A a timing of subsequent signal transmission in the uplink UL by the known method, possibly taking into account received from the base station Node B binary or ternary timing commands.
  • the subscriber terminal UE A does not send any further signals in the upward direction to the base station Node B, but carries out a new synchronization procedure. This resynchronization is useful because the detection probability of subsequently transmitted in the uplink UL signals is greatly reduced due to the large time offset.
  • the subscriber terminal UE A carries out a so-called unsynchronized RACH procedure (RACH-Random Access Channel)
  • the subscriber terminal UE A initially controls the time transmission for an open control loop exclusively on the basis of signals received from the base station Node B of a pilot, synchronization or Broadcast channels and sends one or more access messages in a random access channel RACH, so the detection probability at the location of the base station Node B is significantly increased by the structure of the access channel RACH and used access messages.
  • the transmission of access messages can be concurrent (English contention based mode) or non-competitive (English contentionfree mode), ie using resources of the access channel RACH, which are reserved exclusively for such a synchronization procedure or subscriber terminals with an existing connection , or of resources, which are also used for other functionalities, for example for a first access (English initial access). This can be selected depending on the status of the user terminal UE A and / or the currently supported service or specified by the standard specification or by the base station Node B signaled system parameters.
  • the base station Node B can also be informed by means of a signaling in the upward direction UL by the user terminal UE A that the threshold value has been exceeded.
  • the user terminal UE A first attempt by means of an autonomous adjustment of the temporal emission of signals in the upward direction UL to compensate for the determined time offset.
  • the signaling in the uplink direction UL is then evaluated by the base station Node B, optionally with own investigations (as described for FIG 4) compared and decided upon application or agreement that the subscriber terminal UE A should perform a new synchronization procedure.
  • This is signaled to the subscriber terminal UE A in a next step, so that it initiates a new synchronization procedure described above after an evaluation of the signaling.
  • known signaling such as are used to define the step size and periodicity of binary commands can be modified or supplemented so that the subscriber terminal is implicitly signaled at a certain value of the step size and / or periodicity to perform a new synchronization procedure ,
  • the user terminal UE A can first of all, upon determining that the determined time offset is equal to or greater than the threshold value, attempt to autonomously adapt the time transmission of signals in the upward direction UL with the goal Compensate determined time offset to perform. If successful with signals sent in the uplink UL to the base station Node B, the base station Node B will proceed to signaling binary or ternary timing commands, or at a greater offset continues with a move to multi-step instructions, but a resynchronization procedure is not performed. After receiving timing commands, the user terminal UE A uses the autonomously compensated time offset as the new reference value and adapts the time transmission based on the reference value according to the signaled commands for subsequent transmissions. On the other hand, if the autonomous compensation is unsuccessful, the method steps described above for FIG. 5 are continued.
  • the steps according to the invention described with reference to FIG. 5 are advantageous, in particular, for subscriber terminals or connections for which a fast response to greatly varying time offsets is not required.
  • subscriber terminals in, for example, a so-called RRC Connected Dormant Mode (RRC) connection mode or in an RRC connection mode with a transmission delay tolerant service, such as downloading a document.
  • RRC RRC Connected Dormant Mode
  • the method steps described with reference to FIG. 4 and FIG. 5 can also advantageously be combined with one another, for example in that a respective time offset is determined both in the base station Node B and in the subscriber terminal UE A, and depending on this, a vote regarding the further exchange of Timing commands or the initiation of a new synchronization procedure between them takes place.
  • the abovementioned threshold values can be defined differently, for example in the sense that a change of binary or ternary timing commands to multi-step timing commands occurs when a first threshold value is exceeded, and a new synchronization procedure is carried out if a second, higher threshold value is exceeded becomes.
  • a signaling bit has, for example, three states (+1, 0, -1) to be able to signal a desired timing or change in the sense of "earlier", “no change” and "later”.
  • This has over the known binary signaling in particular the advantage that only the states “earlier” and “later” could be signaled by the binary signaling, even if due to the determined time offset actually no change over time of the broadcasts of the user equipment UE A is required (ie the time offset is smaller than the predetermined maximum time offset), as may occur, for example, with more or less stationary terminals, small radio cells or only low speed of a vertical direction of movement of the terminal.
  • the base station Node B would carry out a periodically changing signaling of "earlier” and “later”, which would lead to a permanent adaptation in the subscriber terminal and thereby to a higher energy consumption.
  • the third signalable state “no change” can be signaled to the subscriber terminal that it should perform no adjustment of the timing of signals in the upward direction.
  • two signaling bits can also be defined for the same three timing commands, for example with the three states 11 "earlier”, 00 “later” and 10 and / or 01 "no change”.
  • the third state "no change” can alternatively also be realized by means of a suppression of the transmission of a timing command in the sense of an interrupted transmission DTX (discontinuous transmission). This means that if the subscriber terminal does not receive a command from the base station although it should actually receive it according to the structure of the transmission of the command, so interprets this non-transmission as a "no change" command.
  • the step size that underlies the timing command can be defined, for example, on a radio cell basis or also subscriber terminal devices individually. If a dedicated upstream channel is UL, i. for example, a certain number of consecutive commands "no change" may signal to the subscriber terminal that the step size of the commands "earlier” or “later” is reduced or increased, in the case of an existing connection for which control of the time synchronization is used; and / or that the periodicity of the time interval of the synchronization control is reduced, ie Timing commands are signaled less frequently.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
EP06022237A 2006-10-04 2006-10-24 Méthode pour contrôler les instants de transmission sur la liaison montante dans un système de communications radio Withdrawn EP1909409A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP06022237A EP1909409A1 (fr) 2006-10-04 2006-10-24 Méthode pour contrôler les instants de transmission sur la liaison montante dans un système de communications radio
PCT/EP2007/060410 WO2008040711A1 (fr) 2006-10-04 2007-10-01 Procédé de contrôle temporel d'une transmission de signal dans le sens ascendant d'un système de radiocommunication
US12/311,603 US20100029291A1 (en) 2006-10-04 2007-10-01 Method for the time-based control of an upward signal transmission in a radio communication system
EP07820792A EP2076978A1 (fr) 2006-10-04 2007-10-01 Procédé de contrôle temporel d'une transmission de signal dans le sens ascendant d'un système de radiocommunication

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP06460034 2006-10-04
EP06022237A EP1909409A1 (fr) 2006-10-04 2006-10-24 Méthode pour contrôler les instants de transmission sur la liaison montante dans un système de communications radio

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EP1909409A1 true EP1909409A1 (fr) 2008-04-09

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EP06022237A Withdrawn EP1909409A1 (fr) 2006-10-04 2006-10-24 Méthode pour contrôler les instants de transmission sur la liaison montante dans un système de communications radio
EP07820792A Withdrawn EP2076978A1 (fr) 2006-10-04 2007-10-01 Procédé de contrôle temporel d'une transmission de signal dans le sens ascendant d'un système de radiocommunication

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EP07820792A Withdrawn EP2076978A1 (fr) 2006-10-04 2007-10-01 Procédé de contrôle temporel d'une transmission de signal dans le sens ascendant d'un système de radiocommunication

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EP (2) EP1909409A1 (fr)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009120462A1 (fr) 2008-03-26 2009-10-01 Qualcomm Incorporated Procédés et appareil pour synchronisation des trames d'une liaison ascendante dans une station d'abonné

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090111445A1 (en) * 2007-10-29 2009-04-30 Motorola, Inc. Method and apparatus for controlling uplink transmission timing in a communication network
US8848624B2 (en) * 2009-08-17 2014-09-30 Broadcom Corporation Multi-user uplink communications within multiple user, multiple access, and/or MIMO wireless communication systems
CN102037772B (zh) * 2009-12-07 2015-06-03 高通股份有限公司 在td-scdma上行链路同步中提高同步移位命令传输效率的方法和装置
CN102196552B (zh) * 2010-03-17 2015-09-16 中兴通讯股份有限公司 一种多终端上行同步的方法及系统
US8526420B2 (en) 2010-07-16 2013-09-03 Blackberry Limited Method and apparatus for autonomous uplink timing advance maintenance
EP2408243B1 (fr) * 2010-07-16 2014-04-09 BlackBerry Limited Procédé et appareil pour la maintenance autonome de l'avance de la temporisation en liaison montante
CN108307495B (zh) * 2016-08-11 2020-12-04 华为技术有限公司 低功耗模式下的ue的跟踪处理方法和设备
ES3058042T3 (en) * 2018-08-17 2026-03-06 Nokia Technologies Oy Performing measurements in telecommunication systems
CN115348684A (zh) 2019-12-13 2022-11-15 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置
CN112996135B (zh) * 2019-12-13 2022-12-06 上海朗帛通信技术有限公司 一种被用于无线通信的节点中的方法和装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001024411A1 (fr) * 1999-09-28 2001-04-05 Siemens Aktiengesellschaft Procede et systeme permettant de maintenir une synchronisation de liaison montante dans des systemes de communication mobiles bases sur un amrc
WO2001058043A2 (fr) * 2000-02-07 2001-08-09 Tantivy Communications, Inc. Liaison de maintenance comprenant des voies de requetes mode actif/attente
GB2381161A (en) * 2001-10-19 2003-04-23 Roke Manor Research Maintaining synchronisation during signal path changes
WO2005048506A2 (fr) * 2003-11-07 2005-05-26 Interdigital Technology Corporation Procede et dispositif destines a la synchronisation en liaison montante dans des communications sans fil

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6907245B2 (en) * 2000-12-04 2005-06-14 Telefonaktiebolaget Lm Ericsson (Publ) Dynamic offset threshold for diversity handover in telecommunications system
US6873662B2 (en) * 2002-02-14 2005-03-29 Interdigital Technology Corporation Wireless communication system having adaptive threshold for timing deviation measurement and method
US7065383B1 (en) * 2002-04-16 2006-06-20 Omri Hovers Method and apparatus for synchronizing a smart antenna apparatus with a base station transceiver
US7746816B2 (en) * 2003-03-13 2010-06-29 Qualcomm Incorporated Method and system for a power control in a communication system
US20060268764A1 (en) * 2005-05-26 2006-11-30 Harris John M Method, apparatus and system for use in allocating reverse channel resources

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001024411A1 (fr) * 1999-09-28 2001-04-05 Siemens Aktiengesellschaft Procede et systeme permettant de maintenir une synchronisation de liaison montante dans des systemes de communication mobiles bases sur un amrc
WO2001058043A2 (fr) * 2000-02-07 2001-08-09 Tantivy Communications, Inc. Liaison de maintenance comprenant des voies de requetes mode actif/attente
GB2381161A (en) * 2001-10-19 2003-04-23 Roke Manor Research Maintaining synchronisation during signal path changes
WO2005048506A2 (fr) * 2003-11-07 2005-05-26 Interdigital Technology Corporation Procede et dispositif destines a la synchronisation en liaison montante dans des communications sans fil

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009120462A1 (fr) 2008-03-26 2009-10-01 Qualcomm Incorporated Procédés et appareil pour synchronisation des trames d'une liaison ascendante dans une station d'abonné
US8451819B2 (en) 2008-03-26 2013-05-28 Qualcomm Incorporated Methods and apparatus for uplink frame synchronization in a subscriber station

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WO2008040711A1 (fr) 2008-04-10
US20100029291A1 (en) 2010-02-04

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